The Rechargeable Cr123 battery system is typically a 3.0v Li-Ion (Lithium Ion) battery most commonly used in small portable devices such as flashlights, cameras, hospital equipment; furthermore, some home security systems utilize the Rechargeable Cr123.

Normal voltage of the Rechargeable Cr123 is 3.0V. There have been some incidents caused by confusion between the Rechargeable Cr123 and the RCR123 3.7V Li-Ion due to lack of cross compatibility between the two different charging stations.  Warnings are plainly displayed on the packaging of single battery units, multiple battery systems, products that come standard with Rechargeable Cr123 batteries, and the large array of charging units including car adapter versions.

With a price tag of around $4.00 per battery, and $30.00 for a set of multiple Rechargeable Cr123 batteries which includes a charging station and multiple hardware options for plugging in the system, the Rechargeable Cr123 is an ideal product for home or portable device use due to the ability to charge these cells up to 1000 times.

Multiple large brand names such as Heavy Duty produce the Rechargeable Cr123; however, there are a number of smaller brands including Tenergy now distributing this battery. Reviews found online at sites like Amazon.com and others tend to reflect somewhat the quality of the batteries manufacturing. With reviews ranging wildly from very poor to fantastic, researching the product by brand before purchase will yield a much higher level of consumer satisfaction.

The normal operating voltage of the Rechargeable Cr123 is 3.0 volts, and the minimum operating voltage is 2.0 volts. Operating voltage at maximum is 3.8 volts which should be considered before purchase as many items that utilize this type of battery are optimized for a very specific voltage, these may include medical equipment and other types of instruments that are intended for critical tasks.

The Rechargeable Cr123 has a discharge rate at maximum is 1.5C and the charging rate is 1C at maximum; however, the recommended rate of charge is 0.5C according to the operating specifications distributed by most brands now producing this type of battery.

Rechargeable Cr123 battery cells have a standardized cell diameter of 16.8mm (millimeters), and a length of 34.25mm. Power input for the charger needed to properly and safely recharge these batteries is typical alternating current 110 volts to 240 volts, and output 4.4 volts via direct current. Two hours is the approximate charging time per battery cell.  A 110 volt output would typically refer to the standard plug-ins found throughout a residence; whereas, 240 volt is most commonly used to plug in major appliances. Not all chargers for the Rechargeable Cr123 have the option for both 110 and 240 volt power adapters.